209975

Information

• Patent Grant
• 209975

• References
• Source

• Patent Number

  209,975

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1878
  146 years ago

• CPC

  • E03C1/295 - using air-supply valves
  • E03C1/1225 - of air admittance valves
  • Y10T137/3258 - Automatic valve in vent line
  • Y10T137/7613 - Threaded into valve casing
  • Y10T137/7917 - Oppositely disposed
  • Y10T137/7918 - Head slidable on guide rod
  • Y10T137/7919 - Guide and seat integral unit

• US Classifications

  • 137 - Fluid handling
  • 251 - Valves and valve actuation